Cutter chain and bars for mining machines



nNOI;4.1923., I'',Z-7,5133@4 n y F. CARTLIDGE CUTTER CHAIN AND BARS Fon MINING MACHINES Filed May 13. 1920 ulmmllllllllmlllllmwp w v 1,41

bit-carrying links l5. All the wear on the cross members 22 occurs on the outer surfaces, because such members are prevented from moving relatively to the rivets 23 and side plates 20.

In order to provide for the sockets 2l, the side plates 2O are made of full thickness from the inner edges which bear against the slideV frame 1l to a point beyond the rivets, and preferably to the outer side of the sockets as shown, instead of being made of full thickness only at and near such inner edges and thinner throughout the rest of their width to provide a relatively narrow flange at the edges as in the present. usual construction. This allows sufficient metal to provide for the sockets 21, and rivets 23.

The outer edges of the side plates 2O cooperate with the inner faces of the flanges l2, as is clear from Fig. 27 toguide the chain. VFor this purpose, the outer edge of each side plate 20 where it is overlapped by the flanges l2 is fiat throughout its middle part, to co-operate with this flange 12 through the straight part of the track, where such flange is widest; but at the ends is cut olf, oblique-ly or on a curve 24, to cooperate with the narrow parts of the flanges l2 at the curved ends of the critter bar, as is clear from Fig. l. The side plates 2O at least at their ends as shown, project outward bevtween the flanges l2, thus making rabbet grooves of the curved parts 24.

By reason of having the side plates 20 of full thickness to a point beyond the. rivets,

the flanges on the side pieces l0 are farther out from the slide member 1l than in the usual construction and for the saine reason the shoulders 19 on the bit-carrying links l5 are farther from the inner edges of such links than is usual.

ln operation,'the links articulate on the outer' surfaces of the cross members 22. a the cutter chain travels in its tracks. rhe chain is guided by the action of the guide member l1 and the flanges 12 of the side pieces l0. llien the cross members 22 become too greatly worn, the rivets 23 are punched out, and new cross members 22 assembled in plates and through bearing holes in the bitcarrying links, said cross members being set in sock-ets in the adjacent faces of the side plates, and rivets passing through said cross members and connecting said side plates, and

said side plates being provided at points outwardly beyond said rivets with outwardlyv facing surfaces force-operating withV guide flanges of a cutter bar, said outwardly facing surfaces being straight through the inter# mediate part of the length of said side plates and cut off obliquely at the end parts the col arc of said oblique cut being greater than the arc of the cross members. Y

2. In a cutter mechanism for mining machines, the combination of bit-carrying links; connecting links for connecting the bit-carrying links, each of said connecting links being formed of two side plates and two cross members extending between such side plates and through bearing holes in the bit-carrying links, said cross members being set in sockets inthe adjacent faces of the side plates, and rivets passing through said cross members and connecting the side plates; and a cutter bar having a chain track for the chain formed by said bit-carrying and connecting links, said chain track having overhanging flanges located outwardbeyond said rivets and co-operating with outwardly disposed faces on said links, the side plates of said connecting links having portions projecting outwardly between said flanges.V

' In witness whereof, l have hereunto set my hand at Terre Haute, indiana, this Sth day of May, A D. one thousand nine hundred and twenty. Y

- FRANKV CARTLDGE. 

